Gilder Gagnon Howe & Co’s Spark Therapeutics, Inc. Common Stock ONCE Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2019 Q1	–	Sell	-507,941	Closed	-$19.9M	–	293
2018 Q4	$19.9M	Sell	507,941 -5,199	-1%	-$225K	0.28%	77
2018 Q3	$28M	Sell	513,140 -12,904	-2%	-$882K	0.29%	86
2018 Q2	$43.5M	Sell	526,044 -6,215	-1%	-$480K	0.47%	68
2018 Q1	$35.4M	Sell	532,259 -15,930	-3%	-$920K	0.44%	67
2017 Q4	$28.2M	Buy	+548,189	New	+$39.4M	0.38%	71
2017 Q2	–	Sell	-6,887	Closed	-$367K	–	312
2017 Q1	$367K	Sell	6,887 -21	-0.3%	-$1.25K	0.01%	219
2016 Q4	$345K	Sell	6,908 -4,587	-40%	-$246K	0.01%	204
2016 Q3	$690K	Sell	11,495 -3	-0%	-$173	0.01%	199
2016 Q2	$588K	Buy	+11,498	New	+$491K	0.01%	200
2015 Q4	–	Sell	-11,802	Closed	-$492K	–	276
2015 Q3	$492K	Sell	11,802 -180,414	-94%	-$9.42M	0.01%	204
2015 Q2	$11.6M	Sell	192,216 -264,388	-58%	-$17.5M	0.15%	103
2015 Q1	$35.4M	Buy	+456,604	New	+$26.3M	0.49%	52